5D MKII or MKIII

﻿There is I am told a saying 'if it is not broken, do not fix it'. You are well familiar with the MKII; the additional benefits ('features' are useless if not employed) may not become apparent to you for some time. I use both but I ensure I take the III if I am attending (something akin to) a golf tournament or motor sport, because of the fps options.